Japan's Inpex Corp. disclosed Thursday that the company-operated Ichthys liquefied natural gas (LNG) Project reached a significant milestone with completion of the offshore pre-lay of the 48 mile (77 kilometer) chain and cable mooring system in the Browse Basin, located off the northern coast of Western Australia.
As part of the mooring system, 49 chains were laid on the seabed in water depths of up to 820 feet (250 meters) and anchored to foundation piles -- 18 feet (5.5 meters) in diameter and 207 feet (63 meters) long.
The mooring system will secure the Project’s two massive offshore facilities -- the Central Processing Facility (CPF) and Floating Production, Storage and Offloading (FPSO) facility -- in the Ichthys Field seabed for at least 40 years of continuous operation.
Once located in the Field, the CPF will deliver natural gas and some condensate through a 553 mile (890 kilometer) subsea gas export pipeline to onshore processing facilities in the Northern Territory. Most condensate will be processed through the FPSO and shipped directly to market from the Field.
Supplying more than 40,000 tons of large-scale anchor chains for the Project represented nearly 18 months of worldwide chain production. Each chain link weighs more than 700 kilograms.
In addition to the mooring system, more than 16,000 tons of subsea structures and 87 miles (140 kilometers) of rigid flowlines have been installed across the Ichthys Field to safely and efficiently extract gas and condensate.
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